And this page is your one-stop spot to find out about some of the best of them.
Happy shopping!
Asda Groceries: Free delivery until March 4 and £2.50 cashback for all first online orders.
Buyagift.com: £5 off all orders that are over £25 until March 5.
Lowcost holidays.com: £15 off all bookings over £150 until March 5 plus cashback.
AA Credit Card: £10 cashback.
La Senza: 15 per cent off purchases plus free deliveries until March 2 plus cashback.
Tesco: £10 off groceries online PLUS £2.50 cashback for new customers.
TM Lewin: £10 off purchases of £100 or more until February 28.
Legal & General life insurance: £50 cashback.
Alliance & Leicester: Switch current accounts and get £100 plus £25 cashback.
Watches Shop: 5 per cent off.
Interflora: 10% off all your purchases.
Get cashback with Captain Cash when you shop at leading specialist retailer of music DVD video computer games and related products, HMV.
Marks and Spencer - Get 2.5% cashback
Get cashback with Captain Cash when you shop at Marks and Spencer - one of the UK's top department stores with over 20,000 products available.
Tesco Direct - get 1.5% cashback
Get cashback with Captain Cash when you shop at Tesco's online department store offering everything from electrical goods to furniture, toys, games and DIY tools.
Get cashback with Captain Cash when you shop at Boots. They stock over items including Boots' exclusive brands and virtually all Boots' seasonal gift range.
Get cashback with Captain Cash when you shop at Argos - one of the UK's most popular retailers, stocking everything from childrens toys to kitchen appliances to mobile phones and CD players.
Get cashback with Captain Cash when you shop at the second biggest department store chain in the UK with 153 stores nationwide - Debenhams.
Get cashback with Captain Cash when you shop at WHSmith - with access to over million products including a million books and thousands of CDs DVDs videos computer games and stationery products.
Comet - Get 1.5% - 1.75% cashback
Get cashback with Captain Cash when you shop at Comet. The Comet site provides the same range and keen prices of their high street stores - all without the trouble of finding an in-store sales assistant.
Blockbuster - Get £3.75 cashback
Get cashback with Captain Cash when you rent a film from the UKs favourite movie rental service.
Waterstones - Get 2% - 2.5% cashback
Get cashback with Captain Cash when you pick up a book from Waterstones - one of the UK's leading booksellers.
ASDA Groceries - Get £2.50 cashback
Get cashback with Captain Cash when you avoid the queues at the tills and do your grocery shopping online with ASDA.
Early Learning Centre - Get 2% cashback
Get cashback with Captain Cash when you shop at the Early Learning Centre - the UK's leading toy retailer for children aged 0-6.
Dorothy Perkins - Get 2.5% cashback
Get cashback with Captain Cash when you shop at Dorothy Perkins. They offers gorgeous, up to the minute fashion and essential items of the season at affordable prices.
Get cashback with Captain Cash when you shop at New Look - the store that sells womenswear, menswear, teen, children and baby wear.
Get cashback with Captain Cash when you shop at Mothercare - the store that offers the widest range of products to buy online for babies, toddlers and mums-to-be.
Carphone Warehouse - Get 2.5% - £20.00 cashback
Get cashback with Captain Cash when you shop at The Carphone Warehouse - the UK's largest retailer of mobile communication products.
Get cashback with Captain Cash when you shop at Ann Summers - the UK's leading retailer of lingerie and adult accessories, clothes, books, DVDs & more.
Thomas Cook - Get 0.75% - 3.25% cashback
Get cashback with Captain Cash when you book your holiday with Thomas Cook - the travel company with 163 years experience.